/*M///////////////////////////////////////////////////////////////////////////////////////
//
//  IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
//
//  By downloading, copying, installing or using the software you agree to this license.
//  If you do not agree to this license, do not download, install,
//  copy or use the software.
//
//
//                        Intel License Agreement
//                For Open Source Computer Vision Library
//
// Copyright (C) 2000, Intel Corporation, all rights reserved.
// Third party copyrights are property of their respective owners.
//
// Redistribution and use in source and binary forms, with or without modification,
// are permitted provided that the following conditions are met:
//
//   * Redistribution's of source code must retain the above copyright notice,
//     this list of conditions and the following disclaimer.
//
//   * Redistribution's in binary form must reproduce the above copyright notice,
//     this list of conditions and the following disclaimer in the documentation
//     and/or other materials provided with the distribution.
//
//   * The name of Intel Corporation may not be used to endorse or promote products
//     derived from this software without specific prior written permission.
//
// This software is provided by the copyright holders and contributors "as is" and
// any express or implied warranties, including, but not limited to, the implied
// warranties of merchantability and fitness for a particular purpose are disclaimed.
// In no event shall the Intel Corporation or contributors be liable for any direct,
// indirect, incidental, special, exemplary, or consequential damages
// (including, but not limited to, procurement of substitute goods or services;
// loss of use, data, or profits; or business interruption) however caused
// and on any theory of liability, whether in contract, strict liability,
// or tort (including negligence or otherwise) arising in any way out of
// the use of this software, even if advised of the possibility of such damage.
//
//M*/

#include "precomp.hpp"

#if defined WIN32 || defined WIN64 || defined _WIN64

#if _MSC_VER >= 1200
#pragma warning( disable: 4710 )
#endif

#include <commctrl.h>
#include <winuser.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <assert.h>

static const char* trackbar_text =
    "                                                                                             ";

#if defined WIN64 || defined _WIN64

#define icvGetWindowLongPtr GetWindowLongPtr
#define icvSetWindowLongPtr( hwnd, id, ptr ) SetWindowLongPtr( hwnd, id, (LONG_PTR)(ptr) )
#define icvGetClassLongPtr  GetClassLongPtr

#define CV_USERDATA GWLP_USERDATA
#define CV_WNDPROC GWLP_WNDPROC
#define CV_HCURSOR GCLP_HCURSOR
#define CV_HBRBACKGROUND GCLP_HBRBACKGROUND

#else

#define icvGetWindowLongPtr GetWindowLong
#define icvSetWindowLongPtr( hwnd, id, ptr ) SetWindowLong( hwnd, id, (size_t)ptr )
#define icvGetClassLongPtr GetClassLong

#define CV_USERDATA GWL_USERDATA
#define CV_WNDPROC GWL_WNDPROC
#define CV_HCURSOR GCL_HCURSOR
#define CV_HBRBACKGROUND GCL_HBRBACKGROUND

#endif

void  FillBitmapInfo(BITMAPINFO* bmi, int width, int height, int bpp, int origin) {
    assert(bmi && width >= 0 && height >= 0 && (bpp == 8 || bpp == 24 || bpp == 32));

    BITMAPINFOHEADER* bmih = &(bmi->bmiHeader);

    memset(bmih, 0, sizeof(*bmih));
    bmih->biSize = sizeof(BITMAPINFOHEADER);
    bmih->biWidth = width;
    bmih->biHeight = origin ? abs(height) : -abs(height);
    bmih->biPlanes = 1;
    bmih->biBitCount = (unsigned short)bpp;
    bmih->biCompression = BI_RGB;

    if (bpp == 8) {
        RGBQUAD* palette = bmi->bmiColors;
        int i;
        for (i = 0; i < 256; i++) {
            palette[i].rgbBlue = palette[i].rgbGreen = palette[i].rgbRed = (BYTE)i;
            palette[i].rgbReserved = 0;
        }
    }
}

struct CvWindow;

typedef struct CvTrackbar {
    int signature;
    HWND hwnd;
    char* name;
    CvTrackbar* next;
    CvWindow* parent;
    HWND buddy;
    int* data;
    int pos;
    int maxval;
    void (*notify)(int);
    void (*notify2)(int, void*);
    void* userdata;
    int id;
}
CvTrackbar;


typedef struct CvWindow {
    int signature;
    HWND hwnd;
    char* name;
    CvWindow* prev;
    CvWindow* next;
    HWND frame;

    HDC dc;
    HGDIOBJ image;
    int last_key;
    int flags;
    int status;//0 normal, 1 fullscreen (YV)

    CvMouseCallback on_mouse;
    void* on_mouse_param;

    struct {
        HWND toolbar;
        int pos;
        int rows;
        WNDPROC toolBarProc;
        CvTrackbar* first;
    }
    toolbar;
}
CvWindow;


#define HG_BUDDY_WIDTH  130

#ifndef TBIF_SIZE
#define TBIF_SIZE  0x40
#endif

#ifndef TB_SETBUTTONINFO
#define TB_SETBUTTONINFO (WM_USER + 66)
#endif

#ifndef TBM_GETTOOLTIPS
#define TBM_GETTOOLTIPS  (WM_USER + 30)
#endif

static LRESULT CALLBACK HighGUIProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
static LRESULT CALLBACK WindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
static LRESULT CALLBACK MainWindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
static void icvUpdateWindowPos(CvWindow* window);

static CvWindow* hg_windows = 0;
static CvWin32WindowCallback hg_on_preprocess = 0, hg_on_postprocess = 0;
static HINSTANCE hg_hinstance = 0;

static const char* highGUIclassName = "HighGUI class";
static const char* mainHighGUIclassName = "Main HighGUI class";

static void icvCleanupHighgui() {
    cvDestroyAllWindows();
    UnregisterClass(highGUIclassName, hg_hinstance);
    UnregisterClass(mainHighGUIclassName, hg_hinstance);
}

CV_IMPL int cvInitSystem(int, char**) {
    static int wasInitialized = 0;

    // check initialization status
    if (!wasInitialized) {
        // Initialize the stogare
        hg_windows = 0;

        // Register the class
        WNDCLASS wndc;
        wndc.style = CS_OWNDC | CS_VREDRAW | CS_HREDRAW;
        wndc.lpfnWndProc = WindowProc;
        wndc.cbClsExtra = 0;
        wndc.cbWndExtra = 0;
        wndc.hInstance = hg_hinstance;
        wndc.lpszClassName = highGUIclassName;
        wndc.lpszMenuName = highGUIclassName;
        wndc.hIcon = LoadIcon(0, IDI_APPLICATION);
        wndc.hCursor = (HCURSOR)LoadCursor(0, (LPSTR)(size_t)IDC_CROSS);
        wndc.hbrBackground = (HBRUSH)GetStockObject(GRAY_BRUSH);

        RegisterClass(&wndc);

        wndc.lpszClassName = mainHighGUIclassName;
        wndc.lpszMenuName = mainHighGUIclassName;
        wndc.hbrBackground = (HBRUSH)GetStockObject(GRAY_BRUSH);
        wndc.lpfnWndProc = MainWindowProc;

        RegisterClass(&wndc);
        atexit(icvCleanupHighgui);

        wasInitialized = 1;
    }

    return 0;
}

CV_IMPL int cvStartWindowThread() {
    return 0;
}

static CvWindow* icvFindWindowByName(const char* name) {
    CvWindow* window = hg_windows;

    for (; window != 0 && strcmp(name, window->name) != 0; window = window->next)
        { ; }

    return window;
}


static CvWindow* icvWindowByHWND(HWND hwnd) {
    CvWindow* window = (CvWindow*)icvGetWindowLongPtr(hwnd, CV_USERDATA);
    return window != 0 && hg_windows != 0 &&
           window->signature == CV_WINDOW_MAGIC_VAL ? window : 0;
}


static CvTrackbar* icvTrackbarByHWND(HWND hwnd) {
    CvTrackbar* trackbar = (CvTrackbar*)icvGetWindowLongPtr(hwnd, CV_USERDATA);
    return trackbar != 0 && trackbar->signature == CV_TRACKBAR_MAGIC_VAL &&
           trackbar->hwnd == hwnd ? trackbar : 0;
}


static const char* icvWindowPosRootKey = "Software\\OpenCV\\HighGUI\\Windows\\";

// Window positions saving/loading added by Philip Gruebele.
//<a href="mailto:pgruebele@cox.net">pgruebele@cox.net</a>
// Restores the window position from the registry saved position.
static void
icvLoadWindowPos(const char* name, CvRect& rect) {
    HKEY hkey;
    char szKey[1024];
    strcpy(szKey, icvWindowPosRootKey);
    strcat(szKey, name);

    rect.x = rect.y = CW_USEDEFAULT;
    rect.width = rect.height = 320;

    if (RegOpenKeyEx(HKEY_CURRENT_USER, szKey, 0, KEY_QUERY_VALUE, &hkey) == ERROR_SUCCESS) {
        // Yes we are installed.
        DWORD dwType = 0;
        DWORD dwSize = sizeof(int);

        RegQueryValueEx(hkey, "Left", NULL, &dwType, (BYTE*)&rect.x, &dwSize);
        RegQueryValueEx(hkey, "Top", NULL, &dwType, (BYTE*)&rect.y, &dwSize);
        RegQueryValueEx(hkey, "Width", NULL, &dwType, (BYTE*)&rect.width, &dwSize);
        RegQueryValueEx(hkey, "Height", NULL, &dwType, (BYTE*)&rect.height, &dwSize);

        if (rect.x != (int)CW_USEDEFAULT && (rect.x < -200 || rect.x > 3000)) {
            rect.x = 100;
        }
        if (rect.y != (int)CW_USEDEFAULT && (rect.y < -200 || rect.y > 3000)) {
            rect.y = 100;
        }

        if (rect.width != (int)CW_USEDEFAULT && (rect.width < 0 || rect.width > 3000)) {
            rect.width = 100;
        }
        if (rect.height != (int)CW_USEDEFAULT && (rect.height < 0 || rect.height > 3000)) {
            rect.height = 100;
        }

        RegCloseKey(hkey);
    }
}


// Window positions saving/loading added by Philip Gruebele.
//<a href="mailto:pgruebele@cox.net">pgruebele@cox.net</a>
// philipg.  Saves the window position in the registry
static void
icvSaveWindowPos(const char* name, CvRect rect) {
    static const DWORD MAX_RECORD_COUNT = 100;
    HKEY hkey;
    char szKey[1024];
    char rootKey[1024];
    strcpy(szKey, icvWindowPosRootKey);
    strcat(szKey, name);

    if (RegOpenKeyEx(HKEY_CURRENT_USER, szKey, 0, KEY_READ, &hkey) != ERROR_SUCCESS) {
        HKEY hroot;
        DWORD count = 0;
        FILETIME oldestTime = { UINT_MAX, UINT_MAX };
        char oldestKey[1024];
        char currentKey[1024];

        strcpy(rootKey, icvWindowPosRootKey);
        rootKey[strlen(rootKey) - 1] = '\0';
        if (RegCreateKeyEx(HKEY_CURRENT_USER, rootKey, 0, NULL, REG_OPTION_NON_VOLATILE, KEY_READ + KEY_WRITE, 0, &hroot, NULL) != ERROR_SUCCESS)
            //RegOpenKeyEx( HKEY_CURRENT_USER,rootKey,0,KEY_READ,&hroot) != ERROR_SUCCESS )
        {
            return;
        }

        for (;;) {
            DWORD csize = sizeof(currentKey);
            FILETIME accesstime = { 0, 0 };
            LONG code = RegEnumKeyEx(hroot, count, currentKey, &csize, NULL, NULL, NULL, &accesstime);
            if (code != ERROR_SUCCESS && code != ERROR_MORE_DATA) {
                break;
            }
            count++;
            if (oldestTime.dwHighDateTime > accesstime.dwHighDateTime ||
                    (oldestTime.dwHighDateTime == accesstime.dwHighDateTime &&
                     oldestTime.dwLowDateTime > accesstime.dwLowDateTime)) {
                oldestTime = accesstime;
                strcpy(oldestKey, currentKey);
            }
        }

        if (count >= MAX_RECORD_COUNT) {
            RegDeleteKey(hroot, oldestKey);
        }
        RegCloseKey(hroot);

        if (RegCreateKeyEx(HKEY_CURRENT_USER, szKey, 0, NULL, REG_OPTION_NON_VOLATILE, KEY_WRITE, 0, &hkey, NULL) != ERROR_SUCCESS) {
            return;
        }
    } else {
        RegCloseKey(hkey);
        if (RegOpenKeyEx(HKEY_CURRENT_USER, szKey, 0, KEY_WRITE, &hkey) != ERROR_SUCCESS) {
            return;
        }
    }

    RegSetValueEx(hkey, "Left", 0, REG_DWORD, (BYTE*)&rect.x, sizeof(rect.x));
    RegSetValueEx(hkey, "Top", 0, REG_DWORD, (BYTE*)&rect.y, sizeof(rect.y));
    RegSetValueEx(hkey, "Width", 0, REG_DWORD, (BYTE*)&rect.width, sizeof(rect.width));
    RegSetValueEx(hkey, "Height", 0, REG_DWORD, (BYTE*)&rect.height, sizeof(rect.height));
    RegCloseKey(hkey);
}

double cvGetMode_W32(const char* name) { //YV
    double result = -1;

    CV_FUNCNAME("cvGetMode_W32");

    __BEGIN__;

    CvWindow* window;

    if (!name) {
        CV_ERROR(CV_StsNullPtr, "NULL name string");
    }

    window = icvFindWindowByName(name);
    if (!window) {
        CV_ERROR(CV_StsNullPtr, "NULL window");
    }

    result = window->status;

    __END__;
    return result;
}

#ifdef MONITOR_DEFAULTTONEAREST
void cvChangeMode_W32(const char* name, double prop_value) {  //Yannick Verdie
    CV_FUNCNAME("cvChangeMode_W32");

    __BEGIN__;

    CvWindow* window;

    if (!name) {
        CV_ERROR(CV_StsNullPtr, "NULL name string");
    }

    window = icvFindWindowByName(name);
    if (!window) {
        CV_ERROR(CV_StsNullPtr, "NULL window");
    }

    if (window->flags & CV_WINDOW_AUTOSIZE) { //if the flag CV_WINDOW_AUTOSIZE is set
        EXIT;
    }

    {
        DWORD dwStyle = GetWindowLongPtr(window->frame, GWL_STYLE);
        CvRect position;

        if (window->status == CV_WINDOW_FULLSCREEN && prop_value == CV_WINDOW_NORMAL) {
            icvLoadWindowPos(window->name, position);
            SetWindowLongPtr(window->frame, GWL_STYLE, dwStyle | WS_CAPTION);

            SetWindowPos(window->frame, HWND_TOP, position.x, position.y , position.width, position.height, SWP_NOZORDER | SWP_FRAMECHANGED);
            window->status = CV_WINDOW_NORMAL;

            EXIT;
        }

        if (window->status == CV_WINDOW_NORMAL && prop_value == CV_WINDOW_FULLSCREEN) {
            //save dimension
            RECT rect;
            GetWindowRect(window->frame, &rect);
            CvRect RectCV = cvRect(rect.left, rect.top, rect.right - rect.left, rect.bottom - rect.top);
            icvSaveWindowPos(window->name, RectCV);

            //Look at coordinate for fullscreen
            HMONITOR hMonitor;
            MONITORINFO mi;
            hMonitor = MonitorFromRect(&rect, MONITOR_DEFAULTTONEAREST);

            mi.cbSize = sizeof(mi);
            GetMonitorInfo(hMonitor, &mi);

            //fullscreen
            position.x = mi.rcMonitor.left; position.y = mi.rcMonitor.top;
            position.width = mi.rcMonitor.right - mi.rcMonitor.left; position.height = mi.rcMonitor.bottom - mi.rcMonitor.top;
            SetWindowLongPtr(window->frame, GWL_STYLE, dwStyle & ~WS_CAPTION);

            SetWindowPos(window->frame, HWND_TOP, position.x, position.y , position.width, position.height, SWP_NOZORDER | SWP_FRAMECHANGED);
            window->status = CV_WINDOW_FULLSCREEN;

            EXIT;
        }
    }

    __END__;
}
#else
void cvChangeMode_W32(const char*, double) {
}
#endif

CV_IMPL int cvNamedWindow(const char* name, int flags) {
    int result = 0;
    CV_FUNCNAME("cvNamedWindow");

    __BEGIN__;

    HWND hWnd, mainhWnd;
    CvWindow* window;
    DWORD defStyle = WS_VISIBLE | WS_MINIMIZEBOX | WS_MAXIMIZEBOX | WS_SYSMENU;
    int len;
    CvRect rect;

    cvInitSystem(0, 0);

    if (!name) {
        CV_ERROR(CV_StsNullPtr, "NULL name string");
    }

    // Check the name in the storage
    if (icvFindWindowByName(name) != 0) {
        result = 1;
        EXIT;
    }

    if (!(flags & CV_WINDOW_AUTOSIZE)) {  //YV add border in order to resize the window
        defStyle |= WS_SIZEBOX;
    }

    icvLoadWindowPos(name, rect);

    mainhWnd = CreateWindow("Main HighGUI class", name, defStyle | WS_OVERLAPPED,
                            rect.x, rect.y, rect.width, rect.height, 0, 0, hg_hinstance, 0);
    if (!mainhWnd) {
        CV_ERROR(CV_StsError, "Frame window can not be created");
    }

    ShowWindow(mainhWnd, SW_SHOW);

    //YV- remove one border by changing the style
    hWnd = CreateWindow("HighGUI class", "", (defStyle & ~WS_SIZEBOX) | WS_CHILD, CW_USEDEFAULT, 0, rect.width, rect.height, mainhWnd, 0, hg_hinstance, 0);
    if (!hWnd) {
        CV_ERROR(CV_StsError, "Frame window can not be created");
    }

    ShowWindow(hWnd, SW_SHOW);

    len = (int)strlen(name);
    CV_CALL(window = (CvWindow*)cvAlloc(sizeof(CvWindow) + len + 1));

    window->signature = CV_WINDOW_MAGIC_VAL;
    window->hwnd = hWnd;
    window->frame = mainhWnd;
    window->name = (char*)(window + 1);
    memcpy(window->name, name, len + 1);
    window->flags = flags;
    window->image = 0;
    window->dc = CreateCompatibleDC(0);
    window->last_key = 0;
    window->status = CV_WINDOW_NORMAL;//YV

    window->on_mouse = 0;
    window->on_mouse_param = 0;

    memset(&window->toolbar, 0, sizeof(window->toolbar));

    window->next = hg_windows;
    window->prev = 0;
    if (hg_windows) {
        hg_windows->prev = window;
    }
    hg_windows = window;
    icvSetWindowLongPtr(hWnd, CV_USERDATA, window);
    icvSetWindowLongPtr(mainhWnd, CV_USERDATA, window);

    // Recalculate window position
    icvUpdateWindowPos(window);

    result = 1;
    __END__;

    return result;
}


static void icvRemoveWindow(CvWindow* window) {
    CvTrackbar* trackbar = NULL;
    RECT wrect = {0, 0, 0, 0};

    if (window->frame) {
        GetWindowRect(window->frame, &wrect);
    }
    if (window->name)
        icvSaveWindowPos(window->name, cvRect(wrect.left, wrect.top,
                                              wrect.right - wrect.left, wrect.bottom - wrect.top));

    if (window->hwnd) {
        icvSetWindowLongPtr(window->hwnd, CV_USERDATA, 0);
    }
    if (window->frame) {
        icvSetWindowLongPtr(window->frame, CV_USERDATA, 0);
    }

    if (window->toolbar.toolbar) {
        icvSetWindowLongPtr(window->toolbar.toolbar, CV_USERDATA, 0);
    }

    if (window->prev) {
        window->prev->next = window->next;
    } else {
        hg_windows = window->next;
    }

    if (window->next) {
        window->next->prev = window->prev;
    }

    window->prev = window->next = 0;

    if (window->dc && window->image) {
        DeleteObject(SelectObject(window->dc, window->image));
    }

    if (window->dc) {
        DeleteDC(window->dc);
    }

    for (trackbar = window->toolbar.first; trackbar != 0;) {
        CvTrackbar* next = trackbar->next;
        if (trackbar->hwnd) {
            icvSetWindowLongPtr(trackbar->hwnd, CV_USERDATA, 0);
            cvFree(&trackbar);
        }
        trackbar = next;
    }

    cvFree(&window);
}


CV_IMPL void cvDestroyWindow(const char* name) {
    CV_FUNCNAME("cvDestroyWindow");

    __BEGIN__;

    CvWindow* window;
    HWND mainhWnd;

    if (!name) {
        CV_ERROR(CV_StsNullPtr, "NULL name string");
    }

    window = icvFindWindowByName(name);
    if (!window) {
        EXIT;
    }

    mainhWnd = window->frame;

    SendMessage(window->hwnd, WM_CLOSE, 0, 0);
    SendMessage(mainhWnd, WM_CLOSE, 0, 0);
    // Do NOT call _remove_window -- CvWindow list will be updated automatically ...

    __END__;
}


static void icvScreenToClient(HWND hwnd, RECT* rect) {
    POINT p;
    p.x = rect->left;
    p.y = rect->top;
    ScreenToClient(hwnd, &p);
    OffsetRect(rect, p.x - rect->left, p.y - rect->top);
}


/* Calculatess the window coordinates relative to the upper left corner of the mainhWnd window */
static RECT icvCalcWindowRect(CvWindow* window) {
    const int gutter = 1;
    RECT crect, trect, rect;

    assert(window);

    GetClientRect(window->frame, &crect);
    if (window->toolbar.toolbar) {
        GetWindowRect(window->toolbar.toolbar, &trect);
        icvScreenToClient(window->frame, &trect);
        SubtractRect(&rect, &crect, &trect);
    } else {
        rect = crect;
    }

    rect.top += gutter;
    rect.left += gutter;
    rect.bottom -= gutter;
    rect.right -= gutter;

    return rect;
}

// returns TRUE if there is a problem such as ERROR_IO_PENDING.
static bool icvGetBitmapData(CvWindow* window, SIZE* size, int* channels, void** data) {
    BITMAP bmp;
    GdiFlush();
    HGDIOBJ h = GetCurrentObject(window->dc, OBJ_BITMAP);
    if (size) {
        size->cx = size->cy = 0;
    }
    if (data) {
        *data = 0;
    }

    if (h == NULL) {
        return true;
    }
    if (GetObject(h, sizeof(bmp), &bmp) == 0) {
        return true;
    }

    if (size) {
        size->cx = abs(bmp.bmWidth);
        size->cy = abs(bmp.bmHeight);
    }

    if (channels) {
        *channels = bmp.bmBitsPixel / 8;
    }

    if (data) {
        *data = bmp.bmBits;
    }

    return false;
}


static void icvUpdateWindowPos(CvWindow* window) {
    RECT rect;
    assert(window);

    if ((window->flags & CV_WINDOW_AUTOSIZE) && window->image) {
        int i;
        SIZE size = {0, 0};
        icvGetBitmapData(window, &size, 0, 0);

        // Repeat two times because after the first resizing of the mainhWnd window
        // toolbar may resize too
        for (i = 0; i < (window->toolbar.toolbar ? 2 : 1); i++) {
            RECT rmw, rw = icvCalcWindowRect(window);
            MoveWindow(window->hwnd, rw.left, rw.top,
                       rw.right - rw.left + 1, rw.bottom - rw.top + 1, FALSE);
            GetClientRect(window->hwnd, &rw);
            GetWindowRect(window->frame, &rmw);
            // Resize the mainhWnd window in order to make the bitmap fit into the child window
            MoveWindow(window->frame, rmw.left, rmw.top,
                       rmw.right - rmw.left + size.cx - rw.right + rw.left,
                       rmw.bottom  - rmw.top + size.cy - rw.bottom + rw.top, TRUE);
        }
    }

    rect = icvCalcWindowRect(window);
    MoveWindow(window->hwnd, rect.left, rect.top,
               rect.right - rect.left + 1,
               rect.bottom - rect.top + 1, TRUE);
}


CV_IMPL void
cvShowImage(const char* name, const CvArr* arr) {
    CV_FUNCNAME("cvShowImage");

    __BEGIN__;

    CvWindow* window;
    SIZE size = { 0, 0 };
    int channels = 0;
    void* dst_ptr = 0;
    const int channels0 = 3;
    int origin = 0;
    CvMat stub, dst, *image;
    bool changed_size = false; // philipg

    if (!name) {
        CV_ERROR(CV_StsNullPtr, "NULL name");
    }

    window = icvFindWindowByName(name);
    if (!window) {
        cvNamedWindow(name, 1);
        window = icvFindWindowByName(name);
    }

    if (!window || !arr) {
        EXIT;    // keep silence here.
    }

    if (CV_IS_IMAGE_HDR(arr)) {
        origin = ((IplImage*)arr)->origin;
    }

    CV_CALL(image = cvGetMat(arr, &stub));

    if (window->image)
        // if there is something wrong with these system calls, we cannot display image...
        if (icvGetBitmapData(window, &size, &channels, &dst_ptr)) {
            return;
        }

    if (size.cx != image->width || size.cy != image->height || channels != channels0) {
        changed_size = true;

        uchar buffer[sizeof(BITMAPINFO) + 255 * sizeof(RGBQUAD)];
        BITMAPINFO* binfo = (BITMAPINFO*)buffer;

        DeleteObject(SelectObject(window->dc, window->image));
        window->image = 0;

        size.cx = image->width;
        size.cy = image->height;
        channels = channels0;

        FillBitmapInfo(binfo, size.cx, size.cy, channels * 8, 1);

        window->image = SelectObject(window->dc, CreateDIBSection(window->dc, binfo,
                                     DIB_RGB_COLORS, &dst_ptr, 0, 0));
    }

    cvInitMatHeader(&dst, size.cy, size.cx, CV_8UC3,
                    dst_ptr, (size.cx * channels + 3) & -4);
    cvConvertImage(image, &dst, origin == 0 ? CV_CVTIMG_FLIP : 0);

    // ony resize window if needed
    if (changed_size) {
        icvUpdateWindowPos(window);
    }
    InvalidateRect(window->hwnd, 0, 0);
    // philipg: this is not needed and just slows things down
//    UpdateWindow(window->hwnd);

    __END__;
}


CV_IMPL void cvResizeWindow(const char* name, int width, int height) {
    CV_FUNCNAME("cvResizeWindow");

    __BEGIN__;

    int i;
    CvWindow* window;
    RECT rmw, rw, rect;

    if (!name) {
        CV_ERROR(CV_StsNullPtr, "NULL name");
    }

    window = icvFindWindowByName(name);
    if (!window) {
        EXIT;
    }

    // Repeat two times because after the first resizing of the mainhWnd window
    // toolbar may resize too
    for (i = 0; i < (window->toolbar.toolbar ? 2 : 1); i++) {
        rw = icvCalcWindowRect(window);
        MoveWindow(window->hwnd, rw.left, rw.top,
                   rw.right - rw.left + 1, rw.bottom - rw.top + 1, FALSE);
        GetClientRect(window->hwnd, &rw);
        GetWindowRect(window->frame, &rmw);
        // Resize the mainhWnd window in order to make the bitmap fit into the child window
        MoveWindow(window->frame, rmw.left, rmw.top,
                   rmw.right - rmw.left + width - rw.right + rw.left,
                   rmw.bottom  - rmw.top + height - rw.bottom + rw.top, TRUE);
    }

    rect = icvCalcWindowRect(window);
    MoveWindow(window->hwnd, rect.left, rect.top,
               rect.right - rect.left + 1, rect.bottom - rect.top + 1, TRUE);

    __END__;
}


CV_IMPL void cvMoveWindow(const char* name, int x, int y) {
    CV_FUNCNAME("cvMoveWindow");

    __BEGIN__;

    CvWindow* window;
    RECT rect;

    if (!name) {
        CV_ERROR(CV_StsNullPtr, "NULL name");
    }

    window = icvFindWindowByName(name);
    if (!window) {
        EXIT;
    }

    GetWindowRect(window->frame, &rect);
    MoveWindow(window->frame, x, y, rect.right - rect.left, rect.bottom - rect.top, TRUE);

    __END__;
}


static LRESULT CALLBACK
MainWindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam) {
    CvWindow* window = icvWindowByHWND(hwnd);
    if (!window) {
        return DefWindowProc(hwnd, uMsg, wParam, lParam);
    }

    switch (uMsg) {
    case WM_DESTROY:

        icvRemoveWindow(window);
        // Do nothing!!!
        //PostQuitMessage(0);
        break;

    case WM_GETMINMAXINFO:
        if (!(window->flags & CV_WINDOW_AUTOSIZE)) {
            MINMAXINFO* minmax = (MINMAXINFO*)lParam;
            RECT rect;
            LRESULT retval = DefWindowProc(hwnd, uMsg, wParam, lParam);

            minmax->ptMinTrackSize.y = 100;
            minmax->ptMinTrackSize.x = 100;

            if (window->toolbar.first) {
                GetWindowRect(window->toolbar.first->hwnd, &rect);
                minmax->ptMinTrackSize.y += window->toolbar.rows * (rect.bottom - rect.top);
                minmax->ptMinTrackSize.x = MAX(rect.right - rect.left + HG_BUDDY_WIDTH, HG_BUDDY_WIDTH * 2);
            }
            return retval;
        }
        break;

    case WM_WINDOWPOSCHANGED: {
        WINDOWPOS* pos = (WINDOWPOS*)lParam;

        // Update the toolbar position/size
        if (window->toolbar.toolbar) {
            RECT rect;
            GetWindowRect(window->toolbar.toolbar, &rect);
            MoveWindow(window->toolbar.toolbar, 0, 0, pos->cx, rect.bottom - rect.top, TRUE);
        }

        if (!(window->flags & CV_WINDOW_AUTOSIZE)) {
            icvUpdateWindowPos(window);
        }

        break;
    }

    case WM_ACTIVATE:
        if (LOWORD(wParam) == WA_ACTIVE || LOWORD(wParam) == WA_CLICKACTIVE) {
            SetFocus(window->hwnd);
        }
        break;

    case WM_ERASEBKGND: {
        RECT cr, tr, wrc;
        HRGN rgn, rgn1, rgn2;
        int ret;
        HDC hdc = (HDC)wParam;
        GetWindowRect(window->hwnd, &cr);
        icvScreenToClient(window->frame, &cr);
        if (window->toolbar.toolbar) {
            GetWindowRect(window->toolbar.toolbar, &tr);
            icvScreenToClient(window->frame, &tr);
        } else {
            tr.left = tr.top = tr.right = tr.bottom = 0;
        }

        GetClientRect(window->frame, &wrc);

        rgn = CreateRectRgn(0, 0, wrc.right, wrc.bottom);
        rgn1 = CreateRectRgn(cr.left, cr.top, cr.right, cr.bottom);
        rgn2 = CreateRectRgn(tr.left, tr.top, tr.right, tr.bottom);
        ret = CombineRgn(rgn, rgn, rgn1, RGN_DIFF);
        ret = CombineRgn(rgn, rgn, rgn2, RGN_DIFF);

        if (ret != NULLREGION && ret != ERROR) {
            FillRgn(hdc, rgn, (HBRUSH)icvGetClassLongPtr(hwnd, CV_HBRBACKGROUND));
        }

        DeleteObject(rgn);
        DeleteObject(rgn1);
        DeleteObject(rgn2);
    }
    return 1;
    }

    return DefWindowProc(hwnd, uMsg, wParam, lParam);
}


static LRESULT CALLBACK HighGUIProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam) {
    CvWindow* window = icvWindowByHWND(hwnd);
    if (!window)
        // This window is not mentioned in HighGUI storage
        // Actually, this should be error except for the case of calls to CreateWindow
    {
        return DefWindowProc(hwnd, uMsg, wParam, lParam);
    }

    // Process the message
    switch (uMsg) {
    case WM_WINDOWPOSCHANGING: {
        LPWINDOWPOS pos = (LPWINDOWPOS)lParam;
        RECT rect = icvCalcWindowRect(window);
        pos->x = rect.left;
        pos->y = rect.top;
        pos->cx = rect.right - rect.left + 1;
        pos->cy = rect.bottom - rect.top + 1;
    }
    break;

    case WM_LBUTTONDOWN:
    case WM_RBUTTONDOWN:
    case WM_MBUTTONDOWN:
    case WM_LBUTTONDBLCLK:
    case WM_RBUTTONDBLCLK:
    case WM_MBUTTONDBLCLK:
    case WM_LBUTTONUP:
    case WM_RBUTTONUP:
    case WM_MBUTTONUP:
    case WM_MOUSEMOVE:
        if (window->on_mouse) {
            POINT pt;
            RECT rect;
            SIZE size = {0, 0};

            int flags = (wParam & MK_LBUTTON ? CV_EVENT_FLAG_LBUTTON : 0) |
                        (wParam & MK_RBUTTON ? CV_EVENT_FLAG_RBUTTON : 0) |
                        (wParam & MK_MBUTTON ? CV_EVENT_FLAG_MBUTTON : 0) |
                        (wParam & MK_CONTROL ? CV_EVENT_FLAG_CTRLKEY : 0) |
                        (wParam & MK_SHIFT ? CV_EVENT_FLAG_SHIFTKEY : 0) |
                        (GetKeyState(VK_MENU) < 0 ? CV_EVENT_FLAG_ALTKEY : 0);
            int event = uMsg == WM_LBUTTONDOWN ? CV_EVENT_LBUTTONDOWN :
                        uMsg == WM_RBUTTONDOWN ? CV_EVENT_RBUTTONDOWN :
                        uMsg == WM_MBUTTONDOWN ? CV_EVENT_MBUTTONDOWN :
                        uMsg == WM_LBUTTONUP ? CV_EVENT_LBUTTONUP :
                        uMsg == WM_RBUTTONUP ? CV_EVENT_RBUTTONUP :
                        uMsg == WM_MBUTTONUP ? CV_EVENT_MBUTTONUP :
                        uMsg == WM_LBUTTONDBLCLK ? CV_EVENT_LBUTTONDBLCLK :
                        uMsg == WM_RBUTTONDBLCLK ? CV_EVENT_RBUTTONDBLCLK :
                        uMsg == WM_MBUTTONDBLCLK ? CV_EVENT_MBUTTONDBLCLK :
                        CV_EVENT_MOUSEMOVE;
            if (uMsg == WM_LBUTTONDOWN || uMsg == WM_RBUTTONDOWN || uMsg == WM_MBUTTONDOWN) {
                SetCapture(hwnd);
            }
            if (uMsg == WM_LBUTTONUP || uMsg == WM_RBUTTONUP || uMsg == WM_MBUTTONUP) {
                ReleaseCapture();
            }

            pt.x = LOWORD(lParam);
            pt.y = HIWORD(lParam);

            GetClientRect(window->hwnd, &rect);
            icvGetBitmapData(window, &size, 0, 0);

            window->on_mouse(event, pt.x * size.cx / MAX(rect.right - rect.left, 1),
                             pt.y * size.cy / MAX(rect.bottom - rect.top, 1), flags,
                             window->on_mouse_param);
        }
        break;

    case WM_PAINT:
        if (window->image != 0) {
            int nchannels = 3;
            SIZE size = {0, 0};
            PAINTSTRUCT paint;
            HDC hdc;
            RGBQUAD table[256];

            // Determine the bitmap's dimensions
            icvGetBitmapData(window, &size, &nchannels, 0);

            hdc = BeginPaint(hwnd, &paint);
            SetStretchBltMode(hdc, COLORONCOLOR);

            if (nchannels == 1) {
                int i;
                for (i = 0; i < 256; i++) {
                    table[i].rgbBlue = (unsigned char)i;
                    table[i].rgbGreen = (unsigned char)i;
                    table[i].rgbRed = (unsigned char)i;
                }
                SetDIBColorTable(window->dc, 0, 255, table);
            }

            if (window->flags & CV_WINDOW_AUTOSIZE) {
                BitBlt(hdc, 0, 0, size.cx, size.cy, window->dc, 0, 0, SRCCOPY);
            } else {
                RECT rect;
                GetClientRect(window->hwnd, &rect);
                StretchBlt(hdc, 0, 0, rect.right - rect.left, rect.bottom - rect.top,
                           window->dc, 0, 0, size.cx, size.cy, SRCCOPY);
            }
            //DeleteDC(hdc);
            EndPaint(hwnd, &paint);
        } else {
            return DefWindowProc(hwnd, uMsg, wParam, lParam);
        }
        return 0;

    case WM_ERASEBKGND:
        if (window->image) {
            return 0;
        }
        break;

    case WM_DESTROY:

        icvRemoveWindow(window);
        // Do nothing!!!
        //PostQuitMessage(0);
        break;

    case WM_SETCURSOR:
        SetCursor((HCURSOR)icvGetClassLongPtr(hwnd, CV_HCURSOR));
        return 0;

    case WM_KEYDOWN:
        window->last_key = (int)wParam;
        return 0;
    }

    return DefWindowProc(hwnd, uMsg, wParam, lParam);
}


static LRESULT CALLBACK WindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam) {
    LRESULT ret;

    if (hg_on_preprocess) {
        int was_processed = 0;
        int ret = hg_on_preprocess(hwnd, uMsg, wParam, lParam, &was_processed);
        if (was_processed) {
            return ret;
        }
    }
    ret = HighGUIProc(hwnd, uMsg, wParam, lParam);

    if (hg_on_postprocess) {
        int was_processed = 0;
        int ret = hg_on_postprocess(hwnd, uMsg, wParam, lParam, &was_processed);
        if (was_processed) {
            return ret;
        }
    }

    return ret;
}


static void icvUpdateTrackbar(CvTrackbar* trackbar, int pos) {
    const int max_name_len = 10;
    const char* suffix = "";
    char pos_text[32];
    int name_len;

    if (trackbar->data) {
        *trackbar->data = pos;
    }

    if (trackbar->pos != pos) {
        trackbar->pos = pos;
        if (trackbar->notify2) {
            trackbar->notify2(pos, trackbar->userdata);
        }
        if (trackbar->notify) {
            trackbar->notify(pos);
        }

        name_len = (int)strlen(trackbar->name);

        if (name_len > max_name_len) {
            int start_len = max_name_len * 2 / 3;
            int end_len = max_name_len - start_len - 2;
            memcpy(pos_text, trackbar->name, start_len);
            memcpy(pos_text + start_len, "...", 3);
            memcpy(pos_text + start_len + 3, trackbar->name + name_len - end_len, end_len + 1);
        } else {
            memcpy(pos_text, trackbar->name, name_len + 1);
        }

        sprintf(pos_text + strlen(pos_text), "%s: %d\n", suffix, pos);
        SetWindowText(trackbar->buddy, pos_text);
    }
}


static LRESULT CALLBACK HGToolbarProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam) {
    CvWindow* window = icvWindowByHWND(hwnd);
    if (!window) {
        return DefWindowProc(hwnd, uMsg, wParam, lParam);
    }

    // Control messages processing
    switch (uMsg) {
        // Slider processing
    case WM_HSCROLL: {
        HWND slider = (HWND)lParam;
        int pos = (int)SendMessage(slider, TBM_GETPOS, 0, 0);
        CvTrackbar* trackbar = icvTrackbarByHWND(slider);

        if (trackbar) {
            if (trackbar->pos != pos) {
                icvUpdateTrackbar(trackbar, pos);
            }
        }

        SetFocus(window->hwnd);
        return 0;
    }

    case WM_NCCALCSIZE: {
        LRESULT ret = CallWindowProc(window->toolbar.toolBarProc, hwnd, uMsg, wParam, lParam);
        int rows = (int)SendMessage(hwnd, TB_GETROWS, 0, 0);

        if (window->toolbar.rows != rows) {
            SendMessage(window->toolbar.toolbar, TB_BUTTONCOUNT, 0, 0);
            CvTrackbar* trackbar = window->toolbar.first;

            for (; trackbar != 0; trackbar = trackbar->next) {
                RECT rect;
                SendMessage(window->toolbar.toolbar, TB_GETITEMRECT,
                            (WPARAM)trackbar->id, (LPARAM)&rect);
                MoveWindow(trackbar->hwnd, rect.left + HG_BUDDY_WIDTH, rect.top,
                           rect.right - rect.left - HG_BUDDY_WIDTH,
                           rect.bottom - rect.top, FALSE);
                MoveWindow(trackbar->buddy, rect.left, rect.top,
                           HG_BUDDY_WIDTH, rect.bottom - rect.top, FALSE);
            }
            window->toolbar.rows = rows;
        }
        return ret;
    }
    }

    return CallWindowProc(window->toolbar.toolBarProc, hwnd, uMsg, wParam, lParam);
}


CV_IMPL void
cvDestroyAllWindows(void) {
    CvWindow* window = hg_windows;

    while (window) {
        HWND mainhWnd = window->frame;
        HWND hwnd = window->hwnd;
        window = window->next;

        SendMessage(hwnd, WM_CLOSE, 0, 0);
        SendMessage(mainhWnd, WM_CLOSE, 0, 0);
    }
}


CV_IMPL int
cvWaitKey(int delay) {
    int time0 = GetTickCount();

    for (;;) {
        CvWindow* window;
        MSG message;
        int is_processed = 0;

        if ((delay > 0 && abs((int)(GetTickCount() - time0)) >= delay) || hg_windows == 0) {
            return -1;
        }

        if (delay <= 0) {
            GetMessage(&message, 0, 0, 0);
        } else if (PeekMessage(&message, 0, 0, 0, PM_REMOVE) == FALSE) {
            Sleep(1);
            continue;
        }

        for (window = hg_windows; window != 0 && is_processed == 0; window = window->next) {
            if (window->hwnd == message.hwnd || window->frame == message.hwnd) {
                is_processed = 1;
                switch (message.message) {
                case WM_DESTROY:
                case WM_CHAR:
                    DispatchMessage(&message);
                    return (int)message.wParam;

                case WM_SYSKEYDOWN:
                    if (message.wParam == VK_F10) {
                        is_processed = 1;
                        return (int)(message.wParam << 16);
                    }
                    break;

                case WM_KEYDOWN:
                    TranslateMessage(&message);
                    if ((message.wParam >= VK_F1 && message.wParam <= VK_F24) ||
                            message.wParam == VK_HOME || message.wParam == VK_END ||
                            message.wParam == VK_UP || message.wParam == VK_DOWN ||
                            message.wParam == VK_LEFT || message.wParam == VK_RIGHT ||
                            message.wParam == VK_INSERT || message.wParam == VK_DELETE ||
                            message.wParam == VK_PRIOR || message.wParam == VK_NEXT) {
                        DispatchMessage(&message);
                        is_processed = 1;
                        return (int)(message.wParam << 16);
                    }
                default:
                    DispatchMessage(&message);
                    is_processed = 1;
                    break;
                }
            }
        }

        if (!is_processed) {
            TranslateMessage(&message);
            DispatchMessage(&message);
        }
    }
}


static CvTrackbar*
icvFindTrackbarByName(const CvWindow* window, const char* name) {
    CvTrackbar* trackbar = window->toolbar.first;

    for (; trackbar != 0 && strcmp(trackbar->name, name) != 0; trackbar = trackbar->next)
        { ; }

    return trackbar;
}


typedef struct {
    UINT cbSize;
    DWORD dwMask;
    int idCommand;
    int iImage;
    BYTE fsState;
    BYTE fsStyle;
    WORD cx;
    DWORD lParam;
    LPSTR pszText;
    int cchText;
}
ButtonInfo;


static int
icvCreateTrackbar(const char* trackbar_name, const char* window_name,
                  int* val, int count, CvTrackbarCallback on_notify,
                  CvTrackbarCallback2 on_notify2, void* userdata) {
    int result = 0;

    CV_FUNCNAME("icvCreateTrackbar");

    __BEGIN__;

    char slider_name[32];
    CvWindow* window = 0;
    CvTrackbar* trackbar = 0;
    int pos = 0;

    if (!window_name || !trackbar_name) {
        CV_ERROR(CV_StsNullPtr, "NULL window or trackbar name");
    }

    if (count <= 0) {
        CV_ERROR(CV_StsOutOfRange, "Bad trackbar maximal value");
    }

    window = icvFindWindowByName(window_name);
    if (!window) {
        EXIT;
    }

    trackbar = icvFindTrackbarByName(window, trackbar_name);
    if (!trackbar) {
        TBBUTTON tbs;
        ButtonInfo tbis;
        RECT rect;
        int bcount;
        int len = (int)strlen(trackbar_name);

        // create toolbar if it is not created yet
        if (!window->toolbar.toolbar) {
            const int default_height = 30;

            window->toolbar.toolbar = CreateToolbarEx(
                                          window->frame, WS_CHILD | CCS_TOP | TBSTYLE_WRAPABLE,
                                          1, 0, 0, 0, 0, 0, 16, 20, 16, 16, sizeof(TBBUTTON));
            GetClientRect(window->frame, &rect);
            MoveWindow(window->toolbar.toolbar, 0, 0,
                       rect.right - rect.left, default_height, TRUE);
            SendMessage(window->toolbar.toolbar, TB_AUTOSIZE, 0, 0);
            ShowWindow(window->toolbar.toolbar, SW_SHOW);

            window->toolbar.first = 0;
            window->toolbar.pos = 0;
            window->toolbar.rows = 0;
            window->toolbar.toolBarProc =
                (WNDPROC)icvGetWindowLongPtr(window->toolbar.toolbar, CV_WNDPROC);

            icvUpdateWindowPos(window);

            // Subclassing from toolbar
            icvSetWindowLongPtr(window->toolbar.toolbar, CV_WNDPROC, HGToolbarProc);
            icvSetWindowLongPtr(window->toolbar.toolbar, CV_USERDATA, window);
        }

        /* Retrieve current buttons count */
        bcount = (int)SendMessage(window->toolbar.toolbar, TB_BUTTONCOUNT, 0, 0);

        if (bcount > 1) {
            /* If this is not the first button then we need to
            separate it from the previous one */
            tbs.iBitmap = 0;
            tbs.idCommand = bcount; // Set button id to it's number
            tbs.iString = 0;
            tbs.fsStyle = TBSTYLE_SEP;
            tbs.fsState = TBSTATE_ENABLED;
            SendMessage(window->toolbar.toolbar, TB_ADDBUTTONS, 1, (LPARAM)&tbs);

            // Retrieve current buttons count
            bcount = (int)SendMessage(window->toolbar.toolbar, TB_BUTTONCOUNT, 0, 0);
        }

        /* Add a button which we're going to cover with the slider */
        tbs.iBitmap = 0;
        tbs.idCommand = bcount; // Set button id to it's number
        tbs.fsState = TBSTATE_ENABLED;
#if 0/*!defined WIN64 && !defined EM64T*/
        tbs.fsStyle = 0;
        tbs.iString = 0;
#else

#ifndef TBSTYLE_AUTOSIZE
#define TBSTYLE_AUTOSIZE        0x0010
#endif

#ifndef TBSTYLE_GROUP
#define TBSTYLE_GROUP           0x0004
#endif
        //tbs.fsStyle = TBSTYLE_AUTOSIZE;
        tbs.fsStyle = TBSTYLE_GROUP;
        tbs.iString = (INT_PTR)trackbar_text;
#endif
        SendMessage(window->toolbar.toolbar, TB_ADDBUTTONS, 1, (LPARAM)&tbs);

        /* Adjust button size to the slider */
        tbis.cbSize = sizeof(tbis);
        tbis.dwMask = TBIF_SIZE;

        GetClientRect(window->hwnd, &rect);
        tbis.cx = (unsigned short)(rect.right - rect.left);

        SendMessage(window->toolbar.toolbar, TB_SETBUTTONINFO,
                    (WPARAM)tbs.idCommand, (LPARAM)&tbis);

        /* Get button position */
        SendMessage(window->toolbar.toolbar, TB_GETITEMRECT,
                    (WPARAM)tbs.idCommand, (LPARAM)&rect);

        /* Create a slider */
        trackbar = (CvTrackbar*)cvAlloc(sizeof(CvTrackbar) + len + 1);
        trackbar->signature = CV_TRACKBAR_MAGIC_VAL;
        trackbar->notify = 0;
        trackbar->notify2 = 0;
        trackbar->parent = window;
        trackbar->pos = 0;
        trackbar->data = 0;
        trackbar->id = bcount;
        trackbar->next = window->toolbar.first;
        trackbar->name = (char*)(trackbar + 1);
        memcpy(trackbar->name, trackbar_name, len + 1);
        window->toolbar.first = trackbar;

        sprintf(slider_name, "Trackbar%p", val);
        trackbar->hwnd = CreateWindowEx(0, TRACKBAR_CLASS, slider_name,
                                        WS_CHILD | WS_VISIBLE | TBS_AUTOTICKS |
                                        TBS_FIXEDLENGTH | TBS_HORZ | TBS_BOTTOM,
                                        rect.left + HG_BUDDY_WIDTH, rect.top,
                                        rect.right - rect.left - HG_BUDDY_WIDTH,
                                        rect.bottom - rect.top, window->toolbar.toolbar,
                                        (HMENU)(size_t)bcount, hg_hinstance, 0);

        sprintf(slider_name, "Buddy%p", val);
        trackbar->buddy = CreateWindowEx(0, "STATIC", slider_name,
                                         WS_CHILD | SS_RIGHT,
                                         rect.left, rect.top,
                                         HG_BUDDY_WIDTH, rect.bottom - rect.top,
                                         window->toolbar.toolbar, 0, hg_hinstance, 0);

        icvSetWindowLongPtr(trackbar->hwnd, CV_USERDATA, trackbar);

        /* Minimize the number of rows */
        SendMessage(window->toolbar.toolbar, TB_SETROWS,
                    MAKEWPARAM(1, FALSE), (LPARAM)&rect);
    } else {
        trackbar->data = 0;
        trackbar->notify = 0;
        trackbar->notify2 = 0;
    }

    trackbar->maxval = count;

    /* Adjust slider parameters */
    SendMessage(trackbar->hwnd, TBM_SETRANGE, (WPARAM)TRUE, (LPARAM)MAKELONG(0, count));
    SendMessage(trackbar->hwnd, TBM_SETTICFREQ, (WPARAM)1, (LPARAM)0);
    if (val) {
        pos = *val;
    }

    SendMessage(trackbar->hwnd, TBM_SETPOS, (WPARAM)TRUE, (LPARAM)pos);
    SendMessage(window->toolbar.toolbar, TB_AUTOSIZE, 0, 0);

    trackbar->pos = -1;
    icvUpdateTrackbar(trackbar, pos);
    ShowWindow(trackbar->buddy, SW_SHOW);
    ShowWindow(trackbar->hwnd, SW_SHOW);

    trackbar->notify = on_notify;
    trackbar->notify2 = on_notify2;
    trackbar->userdata = userdata;
    trackbar->data = val;

    /* Resize the window to reflect the toolbar resizing*/
    icvUpdateWindowPos(window);

    result = 1;

    __END__;

    return result;
}

CV_IMPL int
cvCreateTrackbar(const char* trackbar_name, const char* window_name,
                 int* val, int count, CvTrackbarCallback on_notify) {
    return icvCreateTrackbar(trackbar_name, window_name, val, count,
                             on_notify, 0, 0);
}

CV_IMPL int
cvCreateTrackbar2(const char* trackbar_name, const char* window_name,
                  int* val, int count, CvTrackbarCallback2 on_notify2,
                  void* userdata) {
    return icvCreateTrackbar(trackbar_name, window_name, val, count,
                             0, on_notify2, userdata);
}

CV_IMPL void
cvSetMouseCallback(const char* window_name, CvMouseCallback on_mouse, void* param) {
    CV_FUNCNAME("cvSetMouseCallback");

    __BEGIN__;

    CvWindow* window = 0;

    if (!window_name) {
        CV_ERROR(CV_StsNullPtr, "NULL window name");
    }

    window = icvFindWindowByName(window_name);
    if (!window) {
        EXIT;
    }

    window->on_mouse = on_mouse;
    window->on_mouse_param = param;

    __END__;
}


CV_IMPL int cvGetTrackbarPos(const char* trackbar_name, const char* window_name) {
    int pos = -1;

    CV_FUNCNAME("cvGetTrackbarPos");

    __BEGIN__;

    CvWindow* window;
    CvTrackbar* trackbar = 0;

    if (trackbar_name == 0 || window_name == 0) {
        CV_ERROR(CV_StsNullPtr, "NULL trackbar or window name");
    }

    window = icvFindWindowByName(window_name);
    if (window) {
        trackbar = icvFindTrackbarByName(window, trackbar_name);
    }

    if (trackbar) {
        pos = trackbar->pos;
    }

    __END__;

    return pos;
}


CV_IMPL void cvSetTrackbarPos(const char* trackbar_name, const char* window_name, int pos) {
    CV_FUNCNAME("cvSetTrackbarPos");

    __BEGIN__;

    CvWindow* window;
    CvTrackbar* trackbar = 0;

    if (trackbar_name == 0 || window_name == 0) {
        CV_ERROR(CV_StsNullPtr, "NULL trackbar or window name");
    }

    window = icvFindWindowByName(window_name);
    if (window) {
        trackbar = icvFindTrackbarByName(window, trackbar_name);
    }

    if (trackbar) {
        if (pos < 0) {
            pos = 0;
        }

        if (pos > trackbar->maxval) {
            pos = trackbar->maxval;
        }

        SendMessage(trackbar->hwnd, TBM_SETPOS, (WPARAM)TRUE, (LPARAM)pos);
        icvUpdateTrackbar(trackbar, pos);
    }

    __END__;
}


CV_IMPL void* cvGetWindowHandle(const char* window_name) {
    void* hwnd = 0;

    CV_FUNCNAME("cvGetWindowHandle");

    __BEGIN__;

    CvWindow* window;

    if (window_name == 0) {
        CV_ERROR(CV_StsNullPtr, "NULL window name");
    }

    window = icvFindWindowByName(window_name);
    if (window) {
        hwnd = (void*)window->hwnd;
    }

    __END__;

    return hwnd;
}


CV_IMPL const char* cvGetWindowName(void* window_handle) {
    const char* window_name = "";

    CV_FUNCNAME("cvGetWindowName");

    __BEGIN__;

    CvWindow* window;

    if (window_handle == 0) {
        CV_ERROR(CV_StsNullPtr, "NULL window");
    }

    window = icvWindowByHWND((HWND)window_handle);
    if (window) {
        window_name = window->name;
    }

    __END__;

    return window_name;
}



CV_IMPL void
cvSetPreprocessFuncWin32(int (__cdecl* on_preprocess)(HWND, UINT, WPARAM, LPARAM, int*)) {
    if (on_preprocess) {
        hg_on_preprocess = on_preprocess;
    } else {
        assert(on_preprocess);
    }
}

CV_IMPL void
cvSetPostprocessFuncWin32(int (__cdecl* on_postprocess)(HWND, UINT, WPARAM, LPARAM, int*)) {
    if (on_postprocess) {
        hg_on_postprocess = on_postprocess;
    } else {
        assert(on_postprocess);
    }
}

#endif //WIN32
